Machine for producing non-woven nettings

ABSTRACT

A machine for producing non-woven flat nettings by laying one or more transverse threads helically across a plurality of parallel warp threads jointly advancing on a stationary support, the cross section of which is at least substantially circular so that a tubular web of netting is formed. The tubular web is slit axially into two or more individual nettings which is reshaped to a flat state by passing over stationary guide means. The guide means comprises for each netting a bail or hoop-like member, the ends of which are located in the vicinity of the points in which the tubular web is slit, and which extends forwardly from the support and preferably in continuation thereof. The netting is deflected outwardly and rearwardly (as compared to the direction of travel of the tubular web) over the bail member to a winding or feeding roller having a rectilinear axis and preferably located rearwardly of the tube slitting means. Between the roller and the bail member there may be provided a curvilinear bow roller and/or additional guide bars joined to the bail member and shaped so that relatively large zones at the edges of the netting are additionally deflected by the bars.

United States Patent [1 1 Solbeck 1 i MACHINE FOR PRODUCING NON-WOVENNETTINGS Erik Solbeck, No. 342 Vedhaek Strandvej, 2950 Vedbaek, Denmark[22] Filed: Feb. I, 1973 [21] Appl. No.: 328,589

[76] Inventor:

Primary Examiner-Daniel J Fritsch Attorney, Agent, or Firm- Browne,Beveridge, DeGrandi & Kline 1 Dec. 17, 1974 l l ABSTRACT v on astationary support, the cross section of which is at least substantiallycircular so that a tubular web of netting is formed. The tubular web isslit axially into two or more individual nettings which is reshaped to aflat state by passing over stationary guide means. The guide meanscomprises for each netting a bail or hoop-like member, the ends of whichare located in the vicinity of the points in which the tubular web isslit, and which extends forwardly from the support and preferably incontinuation thereof. The netting is deflected outwardly and rearwardly(as compared to the direction of travel of the tubular web) over thebail member to a winding or feeding roller having a rectilinear axis andpreferably located rearwardly of the tube slitting means. Between theroller and the bail member there may be provided a curvilinear bowroller and/or additional guide bars joined to the bail member and shapedso that relatively large Zones at the edges of the netting areadditionally deflected by the bars.

9 Claims, 2 Drawing Figures PATENTEU 3.855.036

sum 1 u; 2

FIG!

PATENTEB DEC] 7 I874 SHEET 2 OF 2 MACHINE FOR PRODUCING NON-WOVENNETTINGS BACKGROUND OF THE INVENTION The present invention relates to amachine for producing nonwoven nettings comprising warp and transversethreads which intersect or cross each other and are bonded to each otherat their points of cross-over. The machine is of the kind which has astationary support of at least substantially circular cross section andarranged for supporting a cylindrical layer of mutually parallel warpthreads which are advanced along said support by any suitable means,such as a pair of rollers, through the nip between which the finishednetting is pulled forward, at least one rotating thread guide for layinga transverse thread in a helical configuration around the layer of warpthreads, means for axially slitting the hose-like web thus formed intoat least two individual nettings, and guide means for straightening orflattening each netting during its travel from the slitting means suchthat the netting is at least substantially flat when it is led over arotatable roller spaced from the, support.

Machines of this kind are known from the specifications of US. Pat. No.2,797,728, issued July 2, 1957, to G. Slayter et a]. and US. Pat. No.3,384,521, textile issued May 21, 1968, to G. W. B. Borup. Dependingupon the properties of the processed threads, the spacing betweenadjacent warp and/or transverse threads,

the speed of rotation of the thread guide and the rate of advance of thewarp threads, it is possible to manufacture fabrics of a widelydifferent nature. To quote an example, netting for reinforcing paper orplastics sheet material may be produced from relatively coarse plasticsor glass fibre yarn and, in the opposite extreme, the machine may beadapted to produce gauze-like fabrics of small mesh width from finedenier texile threads on yarns. The bonding between the warp threads andthe transverse threads can be effected in any suitable way, eg by meansof an adhesive applied to one or the other thread system or merely byheating the threads if these are fabricated from or coated with athermoplastic material.

The machine operates in all instances at a high rate of production and,particularly in order to maintain a uniform tension in the transversethread or threads, it is important that the hose-like web formed by thelaying operation is at least approximately circular in cross sectionbefore it is slit axially. On the other hand, this cross sectional shapeimplies in the prior art machines that the reshaping of the individualnettings to the flat state which is necessary for permitting thesubsequent winding-up of the nettings, takes place during a relativelylong travel of the netting after the originally tubular web has beenslit, and consequently the machine, which normally is verticallyoriented becomes correspondingly high. In practice it has been foundthat the ratio between the necessary height of the machine and the widthof the nettings, which can be produced in the machine, is an importantrestrictive factor in respect of the width of nettings which can bemanufactured. It is an object of the invention to eliminate thisdisadvantage.

BRIEF SUMMARY OF THE INVENTION According to the invention there isprovided a machine for producing a non-woven netting comprising crossingwarp and transverse threads connected together at their points ofcross-over, said machine having a stationary frame including supportmeans of at least substantially circular cross section for supporting aplurality of parallel warp threads in the form of a cylindrical threadlayer, means for jointly advancing said warp threads in theirlongitudinal direction, at least one rotary thread guide for laying atransverse thread in a helical configuration around said layer of warpthreads to form a hoselike web, drive means for rotating said threadguide, means for longitudinally slitting said hose-like web into atleast two individual nettings, at least two rotatably supported rollersspaced from said support means and having rectilinear axes, and guidemeans between said slitting means and each of said rollers for reshapingeach netting into a flat shape, said guide means comprising a stationaryguide member formed with a curvilinear guiding edge located adjacent thepath of said hose-like web and extending from its ends, which arelocated downstream of the associated slitting means, symmetricallyoutwardly from a line connecting the slitting means and forwardly in thedirection of advance of said hose-like web, whereby the centre point ofsaid edge is located furthest away from said connecting line, the axesof said rotatable rollers being located rearwardly of said centre pointof the guiding edge, as seen in the direction of travel of saidhose-like fabric. I

The construction of the known machines referred to above appears topermit the conclusion that it has hitherto been generally assumed thatin order to obtain a netting having at least substantially rectangularmeshes, that is to say with relatively little distortion or deformationof the netting during its reshaping from a partcylindrical to a flatshape, it was mandatory to advance the individual nettings in the samedirection during the reshaping as during the formation of the tubular orhose-like web and at the same time stretch them in the lateral directionand move the central position of the netting towards the axis of thetubular web.

The present invention is based on the new and surprizing recognitionthat it is possible to achieve the same effect by leading each nettingfrom the point at which the tubular web is slit to the winding meansacross suitably shaped stationary members which at the same timesuccessively flatten or spread out the netting to flat shape and duringits flattening operation cause the netting in its entirety to follow apath extending outwardly relative to the axis of the cylindricalsupport. This leads to the result that the dimension of the machine inthe direction of the axis may be considerably shorter than in the priorart machines. It has been found possible to construct a verticalmachine, the height of which does not exceed half the circumferentiallength of the unslit hose-like web, that is to say, less. than half thenecessary height of a machine constructed according to the principleshitherto employed. In practice this means that it is possible toinstall, in premises having a given ceiling height, a machine which iscapable of producing netting having twice the width it has previouslybeen possible to produce in the same premises.

With the novel guide means of the present invention for flattening thenetting it is possible to ensure not only that between the slittingstation and said roller, at which the netting is straightened out into aflat shape, the individual warp threads all follow equally long paths sothat the flat netting has rectangular meshes, but also that therectangular mesh shape is maintained during the flattening operation inwhich the various zones of the width of the netting are successivelydeflected across the guiding edge. This means that only comparativelyweak stresses act on the individual threads and on the adhesiveconnections at the points of crossover because the warp threads, duringtheir travel, do not have any significant tendency towards beingdisplaced in the lateral direction whereby they would exert tractionalforces on the connecting transverse threads.

It is possible, therefore, to reduce the quantity of adhesive used forjoining the threads together and the unfolding or flattening operationmay start very shortly after the tubular web has passed the area inwhich the thread guide laying the transverse thread is operative, thatis to say, at a time when the bonded points may not have reached theirfull strength yet. This also contributes to reduce the dimension of themachine in the advancing direction of the tubular web, that is to say,the height of the machine in the case of the vertically oriented machinediscussed above.

The guide edge may extend at least substantially contiguous. to thecylindrical path of movement of the hose-like fabric and the axes of therotatable rollers may be located rearwardly of the line connecting theend points of the guiding edge. Both these details contribute toreducing the space requirement of the machine in the axial direction aswell as perpendicularly hereto.

The guiding edge may be formed by a curvilinear bail or hoop-like memberwhich, between its ends is supported relative to the frame of themachine by means of at least two struts, the length of which isadjustable. Thus, the friction on the netting during the flatteningoperation is reduced, since it moves freely both upstream and downstreamof the bail. It is, however, within the scope of the invention to employguide means having larger dimensions in the direction of movement of thenetting, for example, a guide means made from sheet metal. With such amore or less continuous guiding means it is possible to achievecorrespondingly more gradual or uniform deflections or changes ofdirection in the paths of the individual threads.

Two stationary guide bars may be arranged between the bail and theroller so as to issue symmetrically from two points between theextremities of the bail and extend outwardly towards the ends of theroller. By adding these guide bars it is possible to render the changesin direction of the warp threads in the edge zones of the netting lesssudden or acute and hence to reduce the stresses on these threads.

It has been found expedient to connect the guide bars to the bail atpoints, the projections of which upon the axis of the associated rollerare located approximately one third of the roller length from the endsthereof, so that the two outermost thirds of the width of the nettingare deflected across both the bail and the guide bars, while thecentremost third is deflected only over the centremost portion of thebail.

The aforesaid length-adjustable struts for supporting the bail may beconnected to the bail at the same points as the guide bars, which lattermay be supported or braced relative to the frame of the machine by meansof length-adjustable struts, whereby a fine adjustment of the pathlengths of the warp threads is rendered possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 of the accompanying drawings isan elevational view of a machine embodying the invention, and

FIG. 2 is a view seen from the lefthand end of FIG. 1.

In both figures portions of the machine and the nettings produced havebeen cut away in order to provide a clearer view.

DETAILED DESCRIPTION The machine illustrated in the drawings has a framecomprising two heavy, substantially mirror-image, boxshaped end members1 and 2 connected at the base of the machine by means of longitudinallyextending box girders 3. Four oblique struts 4 projecting upwardly fromthe end members I and 2 are, at their top, connected to two box girders5 extending in the longitudinal direction and being, in turn, connectedthrough horizontal transverse girders 6. Four vertical columns orsupports 7 are suspended in the centre of the machine from thetransverse girders 5 and the supports which, in a suitable manner, maybe additionally braced against each other, carry the means describedbelow for supporting the warp threads of a netting that is beingproduced in the machine.

Said supporting means comprise an annular heating means 8 secured to astrong base plate 9 which is rigidly connected to supports 7. As shown,heating means 8 may be a hollow sheet metal structure the inside ofwhich is filled with a suitable insulation material 10. On the inside ofring 8, a heating element 11 is fitted. A cooling ring 12 is mountedabove ring 8 and, as shown, ring 12 may be provided with apertures inits surface behind which motor-driven blowers I3 aremounted for ejectingcooling air through the apertures. Each aperture can, as shown to theleft-hand side of FIG. 1, be covered by a filter screen or mesh. Anadditional cooling ring 14 mounted above ring 12 is hollow and a liquidcoolant may be circulated through ring 14 to effect an additionalcooling of the produced netting. Rings 12 and 14 are secured to supports7 in a manner not shown in detail.

Two concentric rings 15 and 16 are suspended on the underside of plate 9and the rings, which may be fabricated from round bars, are providedwith radially aligned pairs of cuts or recesses which serve as guidesfor the warp threads mentioned above and shown in FIG. 1 at 17. The warpthreads are supplied from stationary bobbins (not shown) or similarsupplies mounted outside the machine, that is to say, to the lefthandside in FIG. I, and each warp thread is passed through a flexible tube18 that may be fabricated from transparent plastics material. Asindicated in FIGS. 1 and 2, tubes 18 may expediently be held together byclips 19 and 20, of which the former surround all the tubes while eachclip 20 surrounds a smaller group of tubes, the arrangement beingadapted to obtain the desired uniform distribution of warp threads 17along the circumference of guide rings 16 and 15.

Two transverse or weft threads 21 and 22 are supplied from separatestationary thread supplies via guide tubes 23 and 24, respectively,which, via rotary or swivel couplings 25, are connected to opposite endsof a rotating hollow shaft 26 journalled coaxially with the rings 8, 12and 14. A pulley 27 is secured to shaft 26 for driving the shaft througha belt (not shown) from a motor 28 shown diagrammatically in FIG. 2, e.g. a hydraulic motor that is fed from a pump (not shown) in the frame ofthe machine. To the rotating shaft 26 there is secured a twin threadguide comprising two hollow arms 29, which project from shaft 26 indiametrically opposed directions and which, at their ends, are formedwith eyelets or other suitable means for guiding the two transversethreads 21 and 22 which thus are helically wound around the warp threads17 advancing in an upwardly direction along ring 8. Thus, there isproduced a tubular netting, the meshes of which, with a fairly goodapproximation, are rectangular depending upon the ratio between the rateof advance of the warp threads 17 and the peripheral speed of the threadguides rotating with shaft 26.

The warp threads and the transverse threads may be joined together attheir mutual points of crossover or intersection in a manner known perse. For instance, each warp thread may be coated, prior to itsintroduction into the associated guiding tube 18, with an adhesive whichmelts under the influence of the heat transferred from ring 8 to thethreads and which subsequently solidifies due to the cooling effect ofrings 12 and 14.

When the warp and/or transverse threads are fabricated fromthermoplastic material or are coated with such a material, it mightalternatively be possible to carry out the bonding operation solely byheating the threads during their passage along ring 8 which,incidentally, may be heated in any appropriate manner, including directoil or gas burners mounted internally of the ring.

The netting thus formed, which, after having passed cooling ring 14,still has a hose or stocking-like shape, is subsequently slit axially attwo diametrically opposed points by means of electrically heated wires30 that project inwardly between two adjacent warp threads and whichsever the transverse threads during the advance of the netting. Thewires 30 are mounted on two brackets 31 which, with the aid of struts32, are secured to a plate 33 which, in turn, is secured to horizontalgirders 34 extending between the vertical supports 7.

To each plate 33 there are secured two bail or hoop shaped guide members35 that may be fabricated from tubing and which, from their oppositeends at which they are mounted on said plates-extend obliquely upwardstowards the apex or centre of each member. As shown, the members 35extend generally in or on a cylindrical surface which is coaxial withrings 8, 12 and 14 and has approximately the same diameter as the rings.As can be seen from FIG. 1, the central portion 35a of each member 35 iscomparatively slightly curved, while the two end portions 35b are morestrongly curved, i.e. they have smaller radii of curva ture. Members 35are, besides being secured to plates 33 at their ends, supported fromthe frame of the machine approximately at the points where sections 35aand 35b merge into each other. The additional support is provided by twooblique struts 36 the lower ends of which are secured to the end members1 and 2 of the frame. The length of struts 36 may be adjustable by meansof adjusting mechanisms 37 of the turnbuckle type provided with rightand left hand thread, which mechanisms may be provided at one or, asshown, both ends of each strut. The lower end of a guide bar 38 bentthrough an obtuse angle and which, like the members 35 and struts 36,may be fabricated from tubing, is secured to each strut 36 by means ofan adjusting mechanism 37. The upper end of each guide bar 38 is joinedto one of members 35 in the proximity of the point where the associatedstrut 36 is connected. Guide bar 38 is not secured to member 35 but isconnected to strut 36 by means of a tab 39 secured to the strut and apivot pin extending through a fork 40 secured to guide bar 38.Furthermore, each guide bar is supported relative to the adjoining endmember 1 or 2 of the frame by means of a rod 41, and by forming rod 41with right and left hand threads analogously with adjusting mechanisms37, its length may be adjustable.

Two rotatable bow rollers 42 having curvilinear axes are supported onthe end members 1 and 2 of the frame outside members 35 and with thevirtual or imaginary axis of each roller, that is to say, the straightline connecting the ends thereof, extending parallel to the connectingline between the two points at which the netting hose is severed bymeans of wires 30. Each roller comprises in a known manner an externaltubular sheath 51 made of rubber or similar material and journalled on acurved shaft 52 by means of anti-friction bearings (not shown)distributed at appropriate intervals along the length of the roller. Ateach end shaft 52 is connected, by means of a universal joint 53, to astub shaft 54 which, during the operation of the machine, is heldstationary in a bearing pedestal 55. Sheath 51 is thus able to rotate onthe stationary curved shaft 52, the orientation of which relative to thevertical axis of the machine can be adjusted by turning the stub shafts54 in their bearing pedestals 55 with the aid of suitable adjustingdevices (not shown). Moreover, the bearing pedestals may be adapted tobe individually shifted on frame members 1 and 2 towards and away fromthe vertical axis, that is to say, towards the left or the right in FIG.2. Due to their curvature, the rollers counteract possible tendenciestowards the formation of creases in the netting webs and, in additionthe above-mentioned adjustments of the orientation of each roller axispermit a fine adjustment of the lengths of the paths travelled by theindividual warp threads analogously with the adjustment effected withthe aid of rods 41 which support the guide bars 38.

Below each roller 42 two rollers 43 and 44 are journalled in the framemembers 1 and 2, and rollers 43, 44 which are normally biased againsteach other, are driven by a common motor in opposite directions ofrotation, so that they serve to advance or pull forward the nettingbetween them. From roller 44, the netting passes over two guide rollers45 before it is wound onto a driven winding roller 46. The two rollers43 and 44 are driven at a normally constant speed which is related tothe speed of rotation of shaft 26 in such a way that the desired meshwidth is obtained in the netting. Roller 46 may be driven by a motoradapted to deliver a torque which is constant irrespective of thevariations in the diameter of the web of netting wound onto roller 46.

It will be understood from what has been explained above that during theoperation of the machine, two webs of netting are formed which from theoriginal semi-cylindrical cross-sectional shape are successivelyreshaped into a plane or flat condition before each web passes into thegap between rollers 43 and 44. For effecting this straightening orflattening operation each netting is first advanced upwardly andoutwardly across the associated member 35 and, subsequently, across'roller 42 whereby, however, the edge zones the width of which, in theembodiment shown, approximates one third of the total width at each sideof the netting, are additionally led over the guide bars 38 betweenmember 35 and roller 42. By appropriate shaping of said guide orflattening means it is possible to achieve that the length of the pathtravelled by each individual warp thread I7 of the netting from thecuttin point to the gap between rollers 43 and 44 is identical for allwarp threads. This means that also in the flattened and subsequentlyrolled-up netting the transverse threads 21 and 22 are locatedpractically perpendicularly to the warp threads, to be more precise, atthe same angle thereto during the helical winding of the transversethreads when the warp threads are supported by ring 8. Since the widthof the flattened netting, as appears from FIG. 1, is considerablygreater than the diameter of the hose-like netting, viz. approximately1.57 times as big, the outermost warp threads of the netting which, inthe drawings, are designated by 17a, have to move outwardly in thedirection of the axis of winding spool 46, however, the greater lengthof travel of these warp threads as compared to the travel of thecentremost warp threads 17b in the netting is compensated for by theextension of the path of travel of threads 17b, which is achieved by theshape of the upwardly directed member 35 and the guide bars 38descending therefrom.

It is remarked that the slitting of the hose-like netting into two ormore individual netting structures may be effected in any suitablemanner, it is possible, for instance, to employ rotating knives insteadof the heated wires shown for slitting a netting fabricated from glassfibres.

What I claim is:

1. In a machine for producing a non-woven netting comprising crossingwarp and transverse threads connected together at their points ofcrossover, said machine including a stationary frame having supportmeans of at least substantially circular cross section for supporting aplurality of parallel warp threads in the, form of a cylindrical threadlayer,

means for jointly advancing said warp threads in their longitudinaldirection,

at least one rotary thread guide for laying a transverse thread in ahelical configuration around said layer of warp threads to form ahose-like web, drive means for rotating said thread guide,

means for longitudinally slitting said hose-like web into at least twoindividual nettings,

at least two rotatably supported rollers spaced from said support meansand having rectilinear axes, and guide means between said slitting meansand each of said rollers for reshaping each netting into a flat shape,the improvement wherein said guide means comprises a. a stationary guidemember formed with a curvilinear guiding edge located adjacent the pathof said hose-like web with its ends located downstream of the associatedslitting means and extending from said ends symmetrically outwardlyrelative to a line connecting the slitting means and forwardly in thedirection of advance of said hose-like web whereby the center point ofsaid edge is located furthest away from said connecting line, the axesof said r0- tatable rollers being located rearwardly of said centerpoint of the guiding edge, as seen in the direction of travel of saidhose-like fabric, and

b. two stationary guide bars each located between said guiding edge andan associated roller, which bars issue symmetrically from two pointsintermediate the ends of the guiding edge and extend outwardly towardsthe ends of the roller.

2. A machine as claimed in claim 1, wherein said guiding edge extends atleast substantially contiguous to the cylindrical path of movement ofsaid liosc-like fabric.

3. A machine as claimed in claim 1 wherein the axes of the rotatablerollers are located rearwardly of a line connecting the ends of saidguiding edge, as seen in the direction of travel of the hose-like web.

4. A machine as claimed in claim 1, wherein said guiding edge isprovided by a curvilinear bail-like member and at least two strutshaving means for adjusting their length are connected between said frameand said bail-like member intermediate the ends thereof.

5. A machine as claimed in claim 4, wherein the struts connecting saidframe with said bail-like member and the guide bars are connected to thebail-like member at the same points as said stationary guide bars.

6. A machine as claimed in claim 1, wherein the guide bars are connectedto the guide member at points, the projections of which upon the axis ofthe associated roller are located approximately one third of the rollerlength from the ends thereof.

7. A machine as claimed in claim 1 comprising struts having means foradjusting their length and connected between said guide bars and saidframe of the machine.

8. A machine as claimed in claim 1, wherein said guide means furthercomprises a freely rotatable bow roller having a curvilinear axis andbeing mounted between each guiding edge and the associated rotatableroller having a rectilinear axis.

9. A machine for producing a non-woven netting comprising crossing warpand transverse threads connected together at their points of crossover,said maching including a stationary frame having support means of atleast substantially circular cross section for supporting a plurality ofparallel warp threads in the form of a cylindrical thread layer,

means for jointly advancing said warp threads in their longitudinaldirection,

at least one rotary thread guide for laying a transverse thread in ahelical configuration around said layer of warp threads to form ahose-like web,

drive means for rotating said thread guide,

means for longitudinally slitting said hose-like web into at least twoindividual nettings,

at least two rotatably supported rollers spaced from said'support meansand having rectilinear axes, and guide means between said slitting meansand each of said rollers for reshaping each netting into a flat shape,the improvement wherein said guide means comprises a. a stationary guidemember formed with a curvilinear guiding edge located adjacent the pathof said hose-like web with its ends located downstream of the associatedslitting means and extending from said ends symmetrically outwardlyrelative to a line tion of travel of said hose-like fabric, and

b. two freely rotatable bow rollers having curvilinear axes, each ofsaid bow rollers being mounted between one of said guiding edges and theassociated rotatable roller having a rectilinear axis.

1. In a machine for producing a non-woven netting comprising crossingwarp and transverse threads connected together at their points ofcrossover, said machine including a stationary frame having supportmeans of at least substantially circular cross section for supporting aplurality of parallel warp threads in the form of a cylindrical threadlayer, means for jointly advancing said warp threads in theirlongitudinal direction, at least one rotary thread guide for laying atransverse thread in a helical configuration around said layer of warpthreads to form a hose-like web, drive means for rotating said threadguide, means for longitudinally slitting said hose-like web into atleast two individual nettings, at least two rotatably supported rollersspaced from said support means and having rectilinear axes, and guidemeans between said slitting means and each of said rollers for reshapingeach netting into a flat shape, the improvement wherein said guide meanscomprises a. a stationary guide member formed with a curvilinear guidingedge located adjacent the path of said hose-like web with its endslocated downstream of the associated slitting means and extending fromsaid ends symmetrically outwardly relative to a line connecting theslitting means and forwardly in the direction of advance of saidhose-like web whereby the center point of said edge is located furthestaway from said connecting line, the axes of said rotatable rollers beinglocated rearwardly of said center point of the guiding edge, as seen inthe direction of travel of said hose-like fabric, and b. two stationaryguide bars each located between said guiding edge and an associatedroller, which bars issue symmetrically from two points intermediate theends of the guiding edge and extend outwardly towards the ends of theroller.
 2. A machine as claimed in claim 1, wherein said guiding edgeextends at least substantially contiguous to the cylindrical path ofmovement of said hose-like fabric.
 3. A machine as claimed in claim 1wherein the axes of the rotatable rollers are located rearwardly of aline connecting the ends of said guiding edge, as seen in the directionof travel of the hose-like web.
 4. A machine as claimed in claim 1,wherein said guiding edge is provided by a curvilinear bail-like memberand at least two struts having means for adjusting their length areconnected between said frame and said bail-like member intermediate theends thereof.
 5. A machine as claimed in claim 4, wherein the strutsconnecting said frame with said bail-like member are connected to thebail-like member at the same points as said stationary guide bars.
 6. Amachine as claimed in claim 1, wherein the guide bars are connected tothe guide member at points, the projections of which upon the axis ofthe associated roller are located approximately one third of the rollerlength from the ends thereof.
 7. A machine as claimed in claim 1comprising struts having means for adjusting their length and connectedbetween said guide bars and said frame of the machine.
 8. A machine asclaimed in claim 1, wherein said guide means further comprises a freelyrotatable bow roller having a curvilinear axis and being mounted betweeneach guiding edge and the associated rotatable roller having arectilinear axis.
 9. A machine for producing a non-woven nettingcomprising crossing warp and transverse threads connected together attheir points of crossover, said maching including a stationary framehaving support means of at least substantially circular cross sectionfor supporting a plurality of parallel warp threads in the form of acylindrical thread layer, meaNs for jointly advancing said warp threadsin their longitudinal direction, at least one rotary thread guide forlaying a transverse thread in a helical configuration around said layerof warp threads to form a hose-like web, drive means for rotating saidthread guide, means for longitudinally slitting said hose-like web intoat least two individual nettings, at least two rotatably supportedrollers spaced from said support means and having rectilinear axes, andguide means between said slitting means and each of said rollers forreshaping each netting into a flat shape, the improvement wherein saidguide means comprises a. a stationary guide member formed with acurvilinear guiding edge located adjacent the path of said hose-like webwith its ends located downstream of the associated slitting means andextending from said ends symmetrically outwardly relative to a lineconnecting the slitting means and forwardly in the direction of advanceof said hose-like web whereby the center point of said edge is locatedfurthest away from said connecting line, the axes of said rotatablerollers being located rearwardly of said center point of the guidingedge, as seen in the direction of travel of said hose-like fabric, andb. two freely rotatable bow rollers having curvilinear axes, each ofsaid bow rollers being mounted between one of said guiding edges and theassociated rotatable roller having a rectilinear axis.